US4998740A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Face seal assembly
Assignee: Boeing North American Inc
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Filing: 1989-09-29
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Granted: 1991-03-12
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Expires: 2009-09-29
Abstract
Abstract An improved face seal assembly (10) is provided to prevent fluid leakage between assembled structural components (12), (14) or the like, such as housing components of a fluid control valve or the like. The face seal assembly (10) comprises a metal seal ring (16) defined by a rigid seal base (22) having generally parallel axial side faces (24), in combination with a pair of deflectable seal legs (26) extending generally radially from the seal base as axially diverging continuation of said side faces. The seal ring (16) is sandwiched coaxially between a pair of film gaskets (18) of a selected seal material, preferably such as a Teflon coated polyimide film. The resultant seal ring and gasket stack forms the face seal assembly (10) and is interposed between assembled housing components or the like to deflect the seal legs (26) toward each other into substantially coplanar relation with the axial side faces (24) of the seal base (22).
Inventors
- 👤 Gilbert F. Tellier
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 12:21
CPC Classifications
F; F16; F16L; F16L23/00; F16L23/16; F16L23/18; F16L23/20; F16J; F16J15/00; F16J15/02; F16J15/021; F16J15/022; F16J15/024; F16J15/025; F16J15/06; F16J15/08; F16J15/0887
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
80 words
A face seal assembly, comprising: a seal member having a seal base defining an axially opposed pair of side faces, and a pair of seal legs extending from said seal base generally in a common direction and defining a pair of axially outboard side surfaces as axially diverging continuations of said side faces; and a pair of film gaskets unconnected to said seal member and having a size and shape for respectively overlying axially opposed sides of said seal member.
Claim 2
Dependent Claim
80 words
A face seal assembly, comprising: a seal member having a seal base defining an axially opposed pair of side faces, and a pair of seal legs extending from said seal base generally in a common direction and defining a pair of axially outboard side surfaces as axially diverging continuations of said side faces; and a pair of film gaskets unconnected to said seal member and having a size and shape for respectively overlying axially opposed sides of said seal member.
Claim 3
Dependent Claim
27 words
The face seal assembly of claim 1 wherein said seal member comprises a metal seal member, and wherein said film gaskets comprises a selected polymer film material.
Claim 4
Dependent Claim
22 words
The face seal assembly of claim 2 wherein said film gaskets further include a seal coating on at least one side thereof.
Claim 5
Dependent Claim
15 words
The face seal assembly of claim 2 wherein said polymer film material comprises a polyimide.
Claim 6
Dependent Claim
23 words
The face seal assembly of claim 1 wherein said seal member and said film gaskets have a generally conforming closed loop geometric shape.
Claim 7
Dependent Claim
23 words
The face seal assembly of claim 1 wherein said seal member comprises a seal ring, and wherein said film gaskets comprise gasket rings.
Claim 8
Dependent Claim
25 words
The face seal assembly of claim 6 wherein said seal legs project generally radially outwardly from said seal base with at least slight axial divergence.
Claim 9
Dependent Claim
25 words
The face seal assembly of claim 6 wherein said seal legs project generally radially inwardly from said seal base with at least slight axial divergence.
Claim 10
Dependent Claim
32 words
The face seal assembly of claim 6 wherein said seal base has a generally rectangular cross sectional shape having a radial dimension corresponding generally with a radial dimension of said seal legs.
Claim 11
Dependent Claim
23 words
The face seal assembly of claim 1 wherein said side faces of said seal base are formed generally in parallel to each other.
Claim 12
Dependent Claim
103 words
A face seal assembly, comprising: a seal ring formed from a relatively hard seal material to define a seal base having an axially opposed pair of generally parallel and generally planar side faces, and a pair of seal legs extending from said seal base in a common radial direction with at least slight axial divergence and defining a pair of axially diverging side surfaces formed as continuations of said side faces; and a pair of generally annular film gaskets formed from a selected soft seal material and respectively overlying said side faces and side surfaces at axially opposed sides of said seal ring.
Claim 13
Dependent Claim
103 words
A face seal assembly, comprising: a seal ring formed from a relatively hard seal material to define a seal base having an axially opposed pair of generally parallel and generally planar side faces, and a pair of seal legs extending from said seal base in a common radial direction with at least slight axial divergence and defining a pair of axially diverging side surfaces formed as continuations of said side faces; and a pair of generally annular film gaskets formed from a selected soft seal material and respectively overlying said side faces and side surfaces at axially opposed sides of said seal ring.
Claim 14
Dependent Claim
27 words
The face seal assembly of claim 11 wherein said seal ring comprises a metal seal ring, and wherein said film gaskets are formed from a polymer material.
Claim 15
Dependent Claim
26 words
The face seal assembly of claim 12 wherein said polymer material comprises a polyimide coated with a Teflon film on at least one axial side thereof.
Claim 16
Dependent Claim
76 words
The face seal assembly of claim 11 further in combination with a pair of structural components, said seal ring being sandwiched between said film gaskets to define a stack sandwiched in turn between said structural components to prevent fluid leakage between said structural components, said structural components applying axial compression forces to said stack to deflect said seal legs toward a position with said side surfaces respectively disposed in generally coplanar relation with said side faces.
References Cited (Backward Citations)
CA700414A
Cited
CA774464A
Cited
US1866160A
Cited
US2459608A
Cited
US3083023A
Cited
US3285615A
Cited
US3307861A
Cited
US4262690A
Cited
JPS57192670A
Cited
FR2517789A1
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1994-03-11 | 1994-09-10 | 1995-03-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1998-03-11 | 1998-09-10 | 1999-03-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2002-03-11 | 2002-09-10 | 2003-03-12 | $7700.00 | Window Closed / Lapsed |